用最小二乘配置获得地形变应变场动态图像的几个问题研究

针对应用于地壳形变应变推估拟合的最小二乘配置实现过程中的几个关键问题,利用模拟等距测边网及大面积水准监测网实测资料,获得了基本上符合高斯型函数特征的位移协方差图形,并给出了确定高斯型函数中参数的方法。在此基础上,将空间域的最小二乘配置内插推广应用于时间域来产生连续变化的动态图像。最小二乘配置具有可以评定精度的优点,已测点分布越密,精度越高。

STUDY ON SOME QUESTIONS OF DYNAMIC PICTURES OF CRUSTAL DEFORMATION AND STRAIN FIELDS OBTAINED BY THE LEAST SQUARE COLLOCATION

In view of some key questions occurred in achieving process of least square collocation used to estimate crustal deformation and strain, by using simulated equal distance range networks and observed data of large areal leveling monitoring networks, the displacement covariance pictures basically conformed to Gauss function characteristics and the method of determining the parameter of the Gauss function are gained. On the basis of obove, the least square collocation used in spacedomain interpolation is spread to the time domain interpolation in order to obtain continuous dynamic pictures. Moreover, the least square collocation has advantage of evaluating precision, the more the observed points distribution density is big, the more the accuracy is high.